Solubilized shellac aerosol hair spray



United States Patent 3,142,622 SQLUBILIZED SHELLAC AERGSOL HAIR SPRAY Clarence Clapp, Montehello, Caiifi, assignor to Western Filling Corporation, Los Angeles, Calif., a corporation of California No Drawing. Filed 0st. 23, 1961, Ser. No. 147,078 6 Claims. (Cl. 161-37) This invention has to do generally with improved aerosol compositions in the category of shellac-containing formulations usable for such purposes as hair sprays and the like. More particularly, the invention is concerned with essentially anhydrous shellac-containing aerosols, and with accomplishment of the objective of achieving compatability of the shellac, alcohol and liquefied gaseous propellant in the packaged state, and rendering the shellac water soluble in an applied state.

Freliminarily it may be observed that the invention is primarily concerned with the use of shellacs which are refined by wax removal, and ordinarily also bleaching and dccolorizing, to obtain the generally known and Widely used quality of shellac employed in such aerosol products as hair sprays, and of which shellac available under the trade name Angelo Super Blonde is typical. Ethyl alcohol is a desirable solvent f r such shellacs, and the packaged system may employ any of various propellants such as trichloromonofluoromethane, methyl chloroform, methylene chloride, vinyl chloride, dichlorodifiuoromethane, dichlorotetrafiuoroethane, saturated hydrocarbons such as propane, isobutane or normal butane, all of which are non-solvents for the shellac.

As mentioned, the invention is concerned with substantially anhydrous packaged aerosol compositions of the character indicated, which by reason of their anhydrous state, present a difficult problem in achieving and maintaining non-precipitating compatability or solubility of the shellac with the alcohol and liquefied propellant, while having the shellac ultimately so conditioned that in its applied state, as to the hair, it will be readily water soluble. I have determined that such compatability and properties of the shellac may be achieved by the use of a solubilizing agent which, as contrasted with a large number of others tested and rejected, is found to be highly selective in its elficacy for the stated purpose.

I have successfully solubilized the shellac in the presence of both the alcohol and propellant, by combining with the shellac 2-amino-2-methyl-l-propanol in an amount suliicient to render the shellac non-precipitating in the container, and, as indicated, water soluble after use application. Such combination may be effected simply by mixing together the shellac and the 2-amino-2- methyl-l-propanol in alcohol.

Depending upon specific uses, the composition may contain other ingredients or modifiers, such as shellac glossing, lubricating or plasticizing agents, as in the case of hair sprays. In such products, I preferably include a glossing agent selectable from various materials known to impart gloss to deposited shellac, such as partially transesterified lanolin and isopropanol (sold under the trade name Isopropylan), and liquid lanolin wax sold as Lanogene), sorbitan trioleate, silicone oils, higher molecular weight alcohols, e.g. oleyl alcohol, and lanolin alcohols. Also included may be appropriate perfumes, dyes and the like as Well as a shellac plasticizer such as cateor oil, glycols and glycerine.

In general, compositions contemplated by the invention will be composed predominately of alcohol and propellant with relatively small proportions of reacted shellac and other components of the character indicated. Ordinarily, and in terms of weight percentages, the anhydrous alcohol content may range from about 25% and 50%, the shellac solids from about 0.75% to 3.0%, 2-amino-2-methyl-1- propanol from about 0.15% to 0.4%, and the glossing agent from about 0.15 to 0.4%. Appropriately small amounts of perfume or the like may be added. The balance of the formula in any particular instance may be propellant to constitute a total on which the foregoing percentages are based.

The following may be cited as typical formulations in accordance with the invention, adapted to be packaged in conventional spray valve equipped aerosol containers.

EXAMPLE I Hydrocarbon system with lower alcohol concentration Component: Weight percent Shellac (Angelo Super Blonde) 2.000 2-amino-2-methyl-l-propanol 0.300 Lanolin wax 0.250 Perfume 0.150 Ethyl alcohol 27.300 Trichloromonofluoromethane 63.500 Propane 6.500

EXAMPLE II Fluorocarbon system with increased alcohol content Component: Weight percent Shellac 2.000 2-amino-2-methyl-l-propanol 0.300 Lanolin wax 0.250 Perfume 0.150 Ethyl alcohol 37.300 Trichloromonofluoromethane 30.000 Dichlorodifluoromethane 30.000

Iclaim:

1. A substantially anhydrous packaged aerosol composition comprising a liquefied normally gaseous propellant, and a mixture of ethyl alcohol and dewaxed shellac reacted with 2-amino-2-methyl-l-propanol in an amount sufficient of maintain non-precipitating compatibility of the shellac with the alcohol and propellant in the packaged state and to render the reacted shellac water soluble after aerosol application in a use state.

2. A composition according to claim 1, containing also an alcohol soluble glossing agent for the applied shellac.

3. A composition according to claim 1, in which said propellant comprises a normally gaseous halogenated hydrocarbon.

4. A composition according to claim 1, in which said propellant comprises a normally gaseous hydrocarbon.

5. A composition according to claim 1, in which the alcohol content is between about 25% and 50% by weight, the shellac solids between about 0.75% and 3.0%, and said propanol between about 0.15 and 0.4%.

6. A composition according to claim 5, containing also about 0.15 to 0.4% of an alcohol soluble glossing agent for the applied wax.

References Cited in the file of this patent Drug and Cosmetic Industry I Dec. 1947: 61,6. page 752.

Drug and Cosmetic Industry III Aug. 1952: 71,2. pages 172-3.

Drug and Cosmetic Industry II May 1954: 74,5. page 715.

Chemical Abstracts Vol. 49:5,006 1956. (Abstract of Soap and Chem. Spec. 31:2 153,5,161,163. 1955.)

Merck Index, 7th Edition, 1960. See page 55.

Sagarin, Cosmetics, 1957, Interscience Publishers, New York pages 535, 5423, 557, 569, 571.

UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No. 3 l42 622 July 28 1964 Clarence Clapp It is hereby certified that error appears in the above numbered patent requiring correction and that the said Letters Patentshould read as corrected below.

Column 2, line 4L2 for "of", first occurrence read Signed and sealed this 17th day of November 1964.

(SEAL) Attest:

ERNEST W. SWIDER EDWARD J. BRENNER Aitcsting Officer Commissioner of Patents 

1. A SUBSTANTIALLY ANHYROUS PACKAGED AEROSOL COMPOSITION COMPRISING A LIQUEFIED NORMALLY GASEOUS PROPELLANT, AND A MIXTURE OF ETHYL ALCOHOL AND DEWAXED SHELLAC REACTED WITH 2-AMINO-2-METHYL-1-PROPANOL IN AN AMOUNT SUFFICIENT OF MAINTAIN NON-PRECIPITATING COMPATABILITY OF THE SHELLAC WITH THE ALCOHOL AND PROPELLANT IN THE PACKAGED STATE AND TO RENDER THE REACTED SHELLAC WATER SOLUBLE AFTER AEROSOL APPLICATION IN A USE STATE. 